Electric motor.



W. J BAUBDTH. ELECTRIC MOTOR.

APPLIGATIOH FILED DEC. 7, 1907.

Patented Jan. 19, 1915.

2 SHEETS-SHEET 1.

"we names W. J. BAUROTH. ELECTRIC MOTOR.

APPLICATION FILED DEC. 7 I907.

Patented Jan. 19, 1915.

2 SHEETS-SHEET 2.

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warm 7 gnmeorn', on; conn'iimngonm, sssiomairo. .mnmaam. anome- ELECTRIC MOTORI.

' Specification of Letters Patent.

Patented Jan, 19,1915.

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Toallaohomefimayaoneemr Be :it lmown that I, a citizen: of the: United Stat'emresidingzat Golumbus,,- in the county; of Franklin: and ,5 State: of: Ohio, have-invented: oertainhnew anduseful. Improvements in Electric: Mm tors, oft-which. the. following 19:8,; speeificav -tion', reference being had therein. to the accompanyingrdrawingi This inventionmelateslto an'electri'c motor and-the improvements have to do more espeoiallywiththe armature shaft, the. bearings, and the casingrstruoture.

' The nature: and objects of theinvention will? appear from-the followinggdesoription imconnection with -theiacoompanyingfirawfi:thavdmwings,-;Eigure11 isotside eleva-:

6.011; of as, motor embodying myt improve manta;- mounted upon; the drivingeailc-rofa locomotive: 012cm",- the near drive. wheel being; rermriverlf;v Figs 2 is a: horizontal-sootional view taken: on the; line of- Fig,- 1; Fig." 3il8i-lz fragmentary vertioal-sedzion through the commutator end of the armature shttftaaid shaft support;- andw Eig. 4 is a fragmentary se'otionthroughthe'pinion'endof .thearmature 'the plane 1 of 1 separation of therfieldiframes- Referring: in detail tea -the construction illustrated, 1 designates, as'an entirety, the motor which has afield frame=- of the box typedivided along diagonal into an upper part 2 andaalower part 3.-

4 and;5 are bolts which pass through lugs formed integral with the field frame-parts to clamp the, latter securely together. Each part of the frame is provided with two pole pieces, as indicated, and which need not be described in detail, as they constitute'no part of my invention. The upper .2,

of the field frame, is provided witha suspension nose 6, while the lower part 3 is pivotally mounted upon the locomotive or car axle 7, being provided with suitable bearings 8, so that the axle 8 turns freely with respect to the motor frame.

Instead of roviding the armature with a rotatable aft mounted in stationary w hearings, I provide the armature, indicated as an entirety by 9, with a central sleeve 10,

which rotates u on a stationary shaft 11 rigidly {mounted in the field frame. A commutator 12 is mounted upon one end of the sleeve 1@ and to' the opposite end. of the Wanna J; Banner-1st,;

sleeve: a pinion; 13: is =1igidly" secured, said pinion" a: tubular extension which fits snugly within the enlarged bore at th'e end of the sleeve and islockedin" position by the bolt 14;. Bearing sleeves 15- are forcedzone into the-commutator end of the sleeve and the other into: thebore of the pmion 13. Within these 'bearingszthe stationary shaft 11 is received; Collars 16 and 17 arerrigidly secured to thepinion and com-,

mute tor ends, respectively, of'theshaft 11 by pure 16- 1-7'.- Theseicollarsare clamped between the-upper and lower sections 2 and.

3-of thefieldt frame, being held against rota tion lay the outer endsrof'ther-pins le -1 which projectinto-slots-or-grooves in the frame casting-es is; clearlykindieated-.:.

The.-collar 1 6, instead-of being -mounted in .the end wall? proper. of the fleldframeas is-thecollar 17, is clamped-- between the upper and-slower. parts 18%; 18! of 'the-cylim drical extension 18 which .pnojectsfrommhe adjacent: end wallof: the-rframe and constitutes ahousing forthe pinioni Thepinion 13mesbeswith the spur gear 19,whichis fastaonrthe-axle 7; A gear casing consisting of: uppen and lower: parts 20?21,.is provided-to inelose' the spur gear 19, this: casing being'radiallyopen on themotor side to fit aborrespondin opening in the cylindrical extension 18 0% the field frame It will be seen" tliat the? cylindrical extension 18, together with-:thecasing 21, constitute aheusing; which completely inclosesthe pinion: and? gear. The two parts of the-gear casing:.-are-sewredtogether y. bolt 22 and the -wholeis upon the motor -.frame hy bolts 2%;-

The shaft 11 is preferably'made hollow, as shown, to-receiwe lubrioanti; which'may h e ledm'to the bearing surfaces through the radially drilled holes '25. The lubricant is preferably fed to 1 thev hollow shaft through a tube 26, which carries atits outer end an oil cup 27. The tube 26 is preferably inserted through ahole in thecollar 17 and threaded-at ,its inner end into the shaft 11, as is 'clearlyshown. ll 'are screw plugs to close the ends of the shaft 11.

It will he seen that oil or grease escaping from the hearing at the pinion end of the shaft will fall into the gear'caefing and help to lubricate the gearing. To prevent the lubricant escaping from the other hearing from coming in contact the commu- It will be seen that by removing the upper part 2 of the field frame, the armature is freed and maybe lifted together with the shaft 11 and its supporting collars 16 and 17- from the lower part 3 of the field frame. It will also be seen that with the construction which I provide although the bearings are far apart and are practically unrestricted as to-length, the longitudinal over all dimension of the motor is reduced to a minimum.

What I claim is: v

1. In an electric motor, the combination of the field frame, an armature shaft having its ends rigidly supported by the end walls of said frame, the armature sleeve surrounding said shaft, thehollow pinion positioned beyond the end of the armature sleeve and rigidly connected with said sleeve at the said end, and bearing sleeves interposed one between and directly engaging the said shaft and hollow pinion, the other interposed between and directly engaging said shaft and the armature sleeve, substantially as set forth.

2. In an electric motor, the combination of the field frame having an outward extension on one of its end walls, the armature shaft having its ends rigidly mounted one in said outward extension, the other in the opposite end wall of the field frame, the armature sleeve surrounding said shaft, the hollow pinion rigid with said sleeve at one end thereof, and bearing sleeves interposed one between said shaft and hollow pinion, the other between said shaft and, the armature sleeve, substantially. as set forth.

3. In an electric motor, the combination of the field frame composed of two parts separable along diametral lines, the armature shaft, collars rigidly secured to the ends of said shaft and clamped between the parts of said frame, and the armature sleeve rotatably mounted on said shaft, substantially as set forth.

4:- In an electric motor, the combination of the field frame formed with an axial, outward extension on one of its end walls and composed of two parts separable along diametral lines through said extension, the

armature shaft, the collars rigidly secured of the field frame having an end wall formed withan axial, outward extending pinion housing with a lateral opening to receive a gear, said frame being composed of 'two parts separable along diametrical lines through said housing, the armature shaft having its -ends clamped one between the parts of the pinion housing, the other between the two sections of-the opposite end wall of the frame, the armature sleeve rotatably mounted on the shaft, a pinion ri idly secured to said sleeve at one end thereof and disposed within the said housing, and a separate gear casing having a lateral opening fitted to the lateral opening of the pinion housing.

6. In an electric motor, the combination of the field frame composed of two parts separable along diametral lines, the stationary armature shaft clamped in position by the parts of said frame, and the armature sleeve rotatably mounted on said shaft, substantially as set forth.

In testimony whereof I aifix my signature, in presence of two witnesses.

WALTER J. BAUROTH.

Witnesses:

F. L. SEssIoNs, E. P. Smvmm 

